diff --git a/etc/miss.sh b/etc/miss.sh
index e9fd8ea8..47e34814 100644
--- a/etc/miss.sh
+++ b/etc/miss.sh
@@ -13,15 +13,7 @@ ish_miss_prepare_compile
 ish_miss_prepare_develop
 ish_miss_prepare_install
 
-ish_miss_prepare_contexts
-ish_miss_prepare_intshell
-ish_miss_prepare_icebergs
-ish_miss_prepare_toolkits
-ish_miss_prepare_volcanos
-ish_miss_prepare_learning
-
 ish_miss_prepare release
-
 # ish_miss_prepare wubi-dict
 # ish_miss_prepare word-dict
 
@@ -31,6 +23,13 @@ ish_miss_prepare golang-story
 ish_miss_prepare redis-story
 ish_miss_prepare mysql-story
 
+ish_miss_prepare_contexts
+ish_miss_prepare_intshell
+ish_miss_prepare_icebergs
+ish_miss_prepare_toolkits
+ish_miss_prepare_volcanos
+ish_miss_prepare_learning
+
 make
 
 ish_sys_link_create ~/.vim_local.vim $PWD/etc/conf/vim_local.vim
diff --git a/go.mod b/go.mod
index 4f606764..9e267eff 100644
--- a/go.mod
+++ b/go.mod
@@ -2,12 +2,30 @@ module shylinux.com/x/contexts
 
 go 1.11
 
+replace (
+	shylinux.com/x/ice => ./usr/release
+	shylinux.com/x/icebergs => ./usr/icebergs
+	shylinux.com/x/toolkits => ./usr/toolkits
+)
+
+replace (
+	shylinux.com/x/golang-story => ./usr/golang-story
+	shylinux.com/x/linux-story => ./usr/linux-story
+	shylinux.com/x/mysql-story => ./usr/mysql-story
+	shylinux.com/x/nginx-story => ./usr/nginx-story
+	shylinux.com/x/redis-story => ./usr/redis-story
+)
+
+require (
+	shylinux.com/x/ice v0.1.7
+	shylinux.com/x/icebergs v0.4.6
+	shylinux.com/x/toolkits v0.3.1
+)
+
 require (
 	shylinux.com/x/golang-story v0.1.1
-	shylinux.com/x/icebergs v0.4.6
 	shylinux.com/x/linux-story v0.1.1
 	shylinux.com/x/mysql-story v0.1.1
 	shylinux.com/x/nginx-story v0.1.1
 	shylinux.com/x/redis-story v0.1.1
-	shylinux.com/x/toolkits v0.3.1
 )
diff --git a/go.sum b/go.sum
index 059f35aa..53949535 100644
--- a/go.sum
+++ b/go.sum
@@ -27,6 +27,8 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 shylinux.com/x/golang-story v0.1.1 h1:IdnwxVfbqaqGrJdSad2a9/cQjP2plimOHCHr2O/B+Hg=
 shylinux.com/x/golang-story v0.1.1/go.mod h1:FHiPa/oFzRUbhXXBc/lQ8Cl13aEEDaskaEwEFkTrGGc=
+shylinux.com/x/ice v0.1.7 h1:Y+4iohquVVpUHbh6jYR1dL16CyO0oEN/UVQ/gx4AZ40=
+shylinux.com/x/ice v0.1.7/go.mod h1:N2+41/RneGDfxP66pWKmdJAW+qtol5uDlcJiniCS1lc=
 shylinux.com/x/icebergs v0.4.4/go.mod h1:mHre+KETs8dFxI/1wlSw24RN+JYYgE1W7ppeZUDp7hc=
 shylinux.com/x/icebergs v0.4.6 h1:ONhshrtZmmPdBfPHzYwR0bp4e12N60lMh4YIA1Hii0I=
 shylinux.com/x/icebergs v0.4.6/go.mod h1:mHre+KETs8dFxI/1wlSw24RN+JYYgE1W7ppeZUDp7hc=
diff --git a/src/main.go b/src/main.go
index e77e2b00..98c0cecc 100644
--- a/src/main.go
+++ b/src/main.go
@@ -1,10 +1,7 @@
 package main
 
 import (
-	ice "shylinux.com/x/icebergs"
-	_ "shylinux.com/x/icebergs/base"
-	_ "shylinux.com/x/icebergs/core"
-	_ "shylinux.com/x/icebergs/misc"
+	"shylinux.com/x/ice"
 
 	_ "shylinux.com/x/icebergs/misc/alpha"
 	_ "shylinux.com/x/icebergs/misc/chrome"
@@ -17,6 +14,7 @@ import (
 	_ "shylinux.com/x/golang-story/src/compile"
 	_ "shylinux.com/x/golang-story/src/project"
 	_ "shylinux.com/x/golang-story/src/runtime"
+
 	_ "shylinux.com/x/nginx-story/src/server"
 	_ "shylinux.com/x/redis-story/src/client"
 	_ "shylinux.com/x/redis-story/src/kafka"
@@ -24,11 +22,13 @@ import (
 
 	_ "shylinux.com/x/linux-story/iso/centos"
 	_ "shylinux.com/x/linux-story/src/busybox"
-	_ "shylinux.com/x/linux-story/src/gcc"
-	_ "shylinux.com/x/linux-story/src/gdb"
 	_ "shylinux.com/x/linux-story/src/glibc"
 	_ "shylinux.com/x/linux-story/src/kernel"
+
+	_ "shylinux.com/x/linux-story/src/gcc"
+	_ "shylinux.com/x/linux-story/src/gdb"
 	_ "shylinux.com/x/linux-story/src/qemu"
+
 	_ "shylinux.com/x/mysql-story/src/client"
 	_ "shylinux.com/x/mysql-story/src/search"
 	_ "shylinux.com/x/mysql-story/src/server"
diff --git a/src/main.shy b/src/main.shy
index 8bf8e003..0a5efa7b 100644
--- a/src/main.shy
+++ b/src/main.shy
@@ -3,7 +3,7 @@ title "contexts"
 refer `
 官网 https://shylinux.com
 源码 https://shylinux.com/x/contexts
-文档 https://shylinux.com/x/learning
+文档 https://shylinux.com/help/tutor.shy
 `
 
 chapter "实践"